PT-2026-35013 · Linux+1 · Linux Kernel+1

Published 2026-04-24 · Updated 2026-05-26 · CVE-2026-31661

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A DMA memory deallocation size mismatch exists in the Broadcom WiFi driver (brcmsmac). The dma alloc consistent() function may alter the allocation size to ensure alignment, and this updated size is stored in the alloced variable. The issue occurs when the size passed to dma free coherent() does not match the actual size used during allocation.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-31661

ECHO-5A27-DC7B-17D1

Affected Products

Linux Kernel

Brcmsmac

References · 20

• https://git.kernel.org/stable/c/f449676bab54fea1440775c8c915dadb323fe015 · Patch
• https://git.kernel.org/stable/c/12cd7632757a54ce586e36040210b1a738a0fc53 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31661 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31661 · Vendor Advisory
• https://git.kernel.org/stable/c/4bf41c2731a0549e21f66180ff780b1e036639ab · Patch
• https://git.kernel.org/stable/c/3c204a0fd079fa7a867151a47d830ad1c2db5177 · Patch
• https://git.kernel.org/stable/c/b27fa888e4a426a3bcf6f6ab24701d888d9bf5aa · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31661 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31661 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-31661 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31661 · Security Note
• https://git.kernel.org/stable/c/77263f053963dea9f3962505ac0c768853d7dc59 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31661 · Security Note
• https://git.kernel.org/stable/c/01f1330d3d1bee07e0c42d40cc48b7be8b6dad84 · Patch
• https://git.kernel.org/stable/c/0f87777b74bcce29b966ec42d9aa8f9edd9b1667 · Patch